Structure made of relatively movable and interlocking sections.



H. GASSTROM. STRUCTURE MADE OF RELATIVELY MOVABLE AND INTERLOCKING SECTIONS,

APPLICATION FILED FEB-1|. I9I3.

Patented Nov. 2, 1915.

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APPLIC'ATIO N FILED FEB. 11. 1913.

2 SHEETSSHEET 2.

INVENTOR e mcm fiassfmm Patented N 0 Q a 2 a a w 8 QQN sATE S f .ATENT EFCE.

HERMAN GASSTROM, on EW YORK," N. Y; A'ssIGNon To DAI-IL MANUFAC URING COMPANY, OF NEW YORK, N. Y., A conPoRA IoN on NEW O K.

"sTRUcTURE MADE OF RELATIVELY MOVABLE AND iNTERI-OCKING SECTIONS.

Application filed February 11, 1913. Serial 110,747,623. v

To all whom it may concern: I

Be it known that I, HERMAN vGAss'rnoM, a

subject of the Czar of Russia,,and a resident of the city of New Yorlgborough of U Manhattan, in the countyand State of New 'York, have invented new and Improved unlocking.

Structures Made of Relatively Movable and Interlocking Sections, of which the follow ing is a specification.

This invention relates to new and useful improvements in relatively movable and interlocking sections, the advantages following the use of'such sections appearing more fully as the description thereof proceeds, the inventive, idea being comprehended within the scope of the appended claims.

The inventive idea is capable of application to a variety of structures adapted for different uses; While I have illustrated one particular use in the accompanying drawings, and have described the relation of the parts adapted to such use, itis, of course, typi' tional view showing the parts in lock and closed position. Fig. 5 is a similar View showing the rule in the act of extension and Figs. 6 and 7 represent plan views of the cooperating locking devices.

As shown in the drawings: the rule consists of a number of sections A, B, G and D, each provided with a grooved side, such as one extending throughout the length of the.

rule, each section having a pocket through its body to contain one of the locking elements to be hereinafter described. Each section has the locking elements secured permanently to it, and is provided with engaging members to slide in the groove of the next adjacent section. 7

Each intermediate section is the same.

One extreme section is provided with a pocket near its mid portion containing a lockin mechanism and the other extreme c I n a sectlon 1s like the intermediate sections, ex-

Specification of Letters Patent. PatntedhldV. 2 1915.

cept that its free end does not have any locking mechanism. p

The locking members for the pockets 2 at the left hand side of Figs. 4 and 5 consist of the plates 6 fastened by prongslOO, into the body of the Wood -.of its section, and provided with curved and bent slide arms 8'to engage the slot of the adjacent section. The plate 6 carries stamped-up bearing pieces 9, in which on an axis 11 a locking lever 10 is mounted. The locking lever 10 is bent as shown atFig. 4, to normally exert.

a spring action onthe lever 10 to project the nose 13 of the lever through the opening surrounded by the metal guard 30, andgto project the end 12 upwardly so that when it reachesanopening '21 in the section immediately above itit will enter such opening. The loclnng member inthe bottom section is similar to that just described. At the rlght of the ruleas shown in the drawings, each section is provided with a plate.16,

having engaging prongs 18 to slide in the adjacent member, bent up trunnions 24: for

a shaft 28, of a lever 22, and prongs 100 to engage the wood of its section. This plate 16 carries an inclinedslide 17 at onev end, and in line with it an aperture 21 shown in dotted lines, Fig. 7, over which aperture one end of a lever 22 normally lies, the end of which is fashionedas a spring 26 tokeep the nose 25 of the locking lever 22 pro jected not only pastthe guard ring 50f its.

own section but into an aperture 20 of the ad acent section, so that normally the nose 25 projecting past the aperture in two adagainst movement.

In order to unlock the sections and permit the rule to be used, but to permit only one section at a time to be moved, the section A is provided, so that itmay always move to and fro after it is unlocked. Upon moving it to the right in Fig. 4: the end 12 will pro ject through the opening 21, lift the lever 22, cause the nose 25 to be withdrawn, and as this happens at the completion of the movement of section A, the section B will then be free to be moved to the right until the nose 12 on the left hand locking mechanlsm on section B disengages the nose 25' of the locking means atthe right of section C,

joining sections will lock the rule sections and so on until all the sections are'disen- I gaged. When the sections are extended and disengaged, one cannot after that collapse any of the sections unless he begins with the section A, depressing the nose 13 to disengage the locking endof the lever 10 from its hooked end 12 from engagement with section C.

It will thus be'seen that the sections are locked with the exception of section A, when in closed position, and can only be unlocked upon movement of section A. The sections are locked in extended position even including section A, which can only be unlocked manually and after which on sliding section A the others will be automatically unlocked successively, and permitted to move by the successive closing of the sections themselves. In order to eifect what is known as inside and outside readings, the inside reading being clearly set forth in my United States Letters Patent No. 978,446, dated December 13th 1910, I only permit movement of the section A for a less distance along the section B than I permit the other sections, and for this purpose I provide the stops? and 8 on section A that their movement will be stopped when they come in contact with the metal portion 19 at the right of the rule.

In carrying out this invention, details of construction may be varied from those shown, and yet the essence of the invention may be retained; some parts might be employed Without others, and new features thereof might be combined with elements old in the art in diverse ways, although the herein described type is regarded as embodying substantial improvements over such modifications.

As many changes could be made in the above construction, and many apparently widely different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted in an illustrative and not in a limiting sense.

It is furthermore desired to be understood that the language used in the following claims is intended to cover all the generic and specific features of the invention herein described, andall statements of the scope of the invention which as a matter of language might be said to fall therebetvveen 1 claim as my inventioni 1. In a device consisting of a number of members sliding one on the other, locking means between adjoining sections adapted to automatically lock one section against movement With its adjoining section upon the mere extension of the device, the manual means for unlocking one section and automatic means operated by the movement of one section along the neXt to unlock further sections successively.

2. In a device consisting of a number of members sliding one upon the other, locking means between adjacent sections adapted on the mere extension of one section to lock it against collapse, and unlocking devices initially manually controlled to permit thereafter successive'collapse of all sections automatically. I

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HERMAN GASSTROM.

l/Vitnesses:

WILLIAM F. NICKEL, LAURENCE J. GALLAGHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

